Common Core Sheets A great resource for math, science, language arts and Social Studies worksheets.they are actually FREE! (Not really sure how truly Common Core they are, but still a good resource for worksheets)
Never Eat Soggy Waffles is a fun mnemonic device to help you remember the cardinal directions--North, East, South, and West! Using mnemonic "memory tricks" or device like this one is a great way to remember difficult facts.
These would be great for teaching algebra equations. Students could use them to help them understand the why and how. Could do something similar for integrated science and defining the variables for power, velocity etc.